Source

File: wp-admin/includes/nav-menu.php

function _wp_nav_menu_meta_box_object( $object = null ) {
	if ( isset( $object->name ) ) {

		if ( 'page' === $object->name ) {
			$object->_default_query = array(
				'orderby'     => 'menu_order title',
				'post_status' => 'publish',
			);

			// Posts should show only published items.
		} elseif ( 'post' === $object->name ) {
			$object->_default_query = array(
				'post_status' => 'publish',
			);

			// Categories should be in reverse chronological order.
		} elseif ( 'category' === $object->name ) {
			$object->_default_query = array(
				'orderby' => 'id',
				'order'   => 'DESC',
			);

			// Custom post types should show only published items.
		} else {
			$object->_default_query = array(
				'post_status' => 'publish',
			);
		}
	}

	return $object;
}